Using Dynamic CT to Explore the Effect of Disease Course on Arytenoid Dislocation

Area of Science:

• Otolaryngology
• Radiology
• Anatomy

Background:

• Arytenoid dislocation can lead to significant laryngeal structural alterations.
• Understanding these changes is crucial for diagnosis and treatment planning.

Purpose of the Study:

• To investigate the structural characteristics of the larynx in patients with arytenoid dislocation using dynamic computed tomography (CT).
• To compare the impact of dislocation duration on laryngeal structural changes.

Main Methods:

• Dynamic CT scans were performed on 23 patients with arytenoid dislocation and 10 healthy controls.
• Patients were categorized into two groups based on dislocation duration (<3 months and >3 months).
• Three-dimensional reconstructions were analyzed for vocal cord height, laryngeal chamber area, and glottic gap.

Main Results:

• Significant differences in vocal cord height and laryngeal chamber area were observed between patients and controls.
• Longer dislocation duration (>3 months) correlated with reduced vocal cord height difference during phonation.
• The affected laryngeal chamber area increased with longer dislocation duration.

Conclusions:

• Dynamic CT provides quantitative evaluation of laryngeal structural changes in arytenoid dislocation.
• Laryngeal structural characteristics evolve over time with the progression of arytenoid dislocation.